Pre-treatment: first of all, clean up the screws operation, detect whether there are burrs, cracks, etc. on the surface of the screws, and polish them. Remove metal chips, oil or oxide skin and other pollutants on the surface of the screws to ensure the plating effect.
Author: Anna
Screw plating process mainly includes the following steps:
Pre-treatment: first of all, clean up the screws operation, detect whether there are burrs, cracks, etc. on the surface of the screws, and polish them. Remove metal chips, oil or oxide skin and other pollutants on the surface of the screws to ensure the plating effect.
Plating process: Cleaned screws are immersed in an aqueous solution containing the deposited metal compounds, and the plating metal is precipitated and deposited on the surface of the screws by passing an electric current through the screws. Common plating metals include zinc, copper, nickel, chromium, copper-nickel alloys and so on.
Post-treatment: After plating is completed, cleaning, passivation, drying and other treatments to enhance the corrosion resistance and aesthetics of the screw.
The purpose of electroplating is to improve the hardness and corrosion resistance of the screws, and at the same time give the screws a beautiful surface appearance. Through plating, screws can function better in various environments and extend their service life.
Matters requiring attention during the plating process include: ensuring that the surface of the screws is free of impurities and defects, the tensile strength of the steel should be within a certain range (not less than 1000 MPa), and heat treatment should be carried out to release the stress before plating. The temperature should be not less than 190 degrees and the time should be not less than 3 hours.